Hair roller



FIG. 1 is a top and side perspective view of the hair roller showing my new design;

FIG. 2 is an end elevational view thereof;

FIG. 3 is an elevational view of the opposite side of FIG. 1;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The interior portions of the roller design form no part of the invention. 

The ornamental design for a hair roller, as shown and described. 